Question

can some body help me please with alg 2?

Answer 1

sure

Answer 2

i need help with that

Answer 3

hint:
the first term is a_1= 3 -4 = -1
whereas the last term is a_18= 3*18 -4 = 50
there are 18 terms, so their sum is:
\[{S_{18}} = \frac{{ - 1 + 50}}{2}18\]

Answer 4

\[{S_{18}} = \frac{{{a_1} + {a_{18}}}}{2}18 = \frac{{ - 1 + 50}}{2}18 = ...?\]

Answer 5

umm not sure

Answer 6

im not good at alg 2

Answer 7

is it 49/262144