In an arithmetic progression the difference between each term (except the first) and the one before is a constant. In a geometric progression, their ratio is a constant. That is, Arithmetic progression U(n) - U(n-1) = d, where d, the common difference, is a constant and n = 2, 3, 4, ... Equivalently, U(n) = U(n-1) + d = U(1) + (n-1)*d Geometric progression U(n) / U(n-1) = r, where r, the common ratio is a non-zero constant and n = 2, 3, 4, ... Equivalently, U(n) = U(n-1)*r = U(1)*r^(n-1).
WTW stands for Words Their Way. I learned this at my school.
If a is the first term and r the common difference, then the nth term is tn = a * (n-1)r So t16 = a + 15r Then 6*t16 = 6(a + 15r) or 6a + 90r No further simplifiaction is possible.
Waves shape a coast when they deposit, sediments, forming coastal features: spits, beach, & SANDBARS ( barrier islands)
A geometric sequence is : a•r^n while a quadratic sequence is a• n^2 + b•n + c So the answer is no, unless we are talking about an infinite sequence of zeros which strictly speaking is both a geometric and a quadratic sequence.
Anterior MI
Poor R wave progression is a vague term used to describe a variation in the pattern formed by the QRS complexes in the chest or precordisl leads. The QRS complex represents the upward and downward deflections denoting the electrical discharge with each heartbeat. Normally the R wave is taller than the S wave by the 4th lead (V4). If the transition does not occur until the 5th or 6th precordisl lead then this is commonly referred to as poor R wave progression. It is used as a distinction from clearly normal patterns and clearly abnormal patterns. It may be found in normal hearts and can frequently be caused by improper placement of the electrodes during the recording of the ECG tracing.
Poor R wave progression on an ECG can be caused by various factors such as obesity, chronic obstructive pulmonary disease (COPD), dextrocardia, pericardial effusion, as well as technical issues such as incorrect lead placement. It is important to consider these factors when interpreting ECG findings.
Delayed R wave progression in the V leads typically suggests that there is slower conduction of the electrical signals through the ventricles, leading to a delayed activation sequence. This can be seen in conditions like bundle branch block or ventricular hypertrophy. Further evaluation is necessary to determine the underlying cause and appropriate management.
Poor R wave progression is a vague term used to describe the transition in voltage in the precordial leads of an electrocardiogram (ECG). It is not a diagnosis but simply describes a pattern frequently noted. In a "normal" individual there is a progressive increase in the magnitude of the voltage in the leads from V1 to V4. When the peak voltage occurs later than V4 it is considered diminished or delayed. The normal criteria are very old and were likely based upon pathologic data. Current ECG technology includes computer interpretation. This particular pattern is usually reported out as "cannot rule out anterior myocardial infarction." The placement of the precordial leads is paramount in obtaining a reliable ECG pattern. Frequently the precordial leads are placed in the wrong position in haste to obtain the electrocardiographic tracing. Women particulary large breasted are most likely to have the leads improperly placed as the left breast usually overlies the 4th and sometimes the 5th intercostal space (where the leads should be placed). In summary, the term poor R wave progression is a vague term and not a diagnosis. Verification of proper leads placement should be the first response followed by echocardiography if there remains concern that there has been prior myocardial injury.
For an Arithmetic Progression, Sum = 15[a + 7d].{a = first term and d = common difference} For a Geometric Progression, Sum = a[1-r^15]/(r-1).{r = common ratio }.
The R-T segment is the portion of the EKG tracing from the R wave to the T wave.
The largest wave is the R
In an arithmetic progression the difference between each term (except the first) and the one before is a constant. In a geometric progression, their ratio is a constant. That is, Arithmetic progression U(n) - U(n-1) = d, where d, the common difference, is a constant and n = 2, 3, 4, ... Equivalently, U(n) = U(n-1) + d = U(1) + (n-1)*d Geometric progression U(n) / U(n-1) = r, where r, the common ratio is a non-zero constant and n = 2, 3, 4, ... Equivalently, U(n) = U(n-1)*r = U(1)*r^(n-1).
R. V. Nisbett has written: 'The progression of a branch of the Dirleton Nisbets to Australia'
they r cats
in paced hearts, the ecg shows a sharp spike just before the qRs or R wave and the R wave will usually be widened if the ventricle is being stimulated directly. Similar to the appearance of the R wave in patients with complete heart block.