-6
9
1 + 2 + 4 + ... + 2n = 2n+1 - 1
Despite conventional wisdom the answer is not 5, it is actually 4.
8
7 + 4 = 11
-6
Nope. Negative 4 plus 6 equals 2. You can see this more easily by rearranging the sum to be 6 - 4 = 2.
You use Plus as a symbol in Maths. Example, 2 Plus 2 equals 4. Or in symbols it would be 2+2=4. __________________________ Plus = + Equals = = (Equals equals =)
the sum of 2 plus 2 is 4/2+2=44
-4 + 7 = 3
24 divided by three equals 8 divided by four equals 6 2 plus 4 equals 6
The sum is 6.