Question

what is the S7 of the terms in the AP 1.0, 1.5, 2.0, 2.5?

Answer 1

First term=a=1
Common difference d=0.5
Sum of n terms=n/2(2a+(n-1)d
Sum of 7 terms =7/2(2+6*0.5)=17.5

Answer 2

HOLA USER ✌

HERE'S YOUR ANSWER FRIEND,

GIVEN : ARITHMETIC PROGRESSION

==> 1 , 1.5, 2, 2.5

LET a BE THE FIRST TERM AND d BE THE COMMON DIFFERENCE AND L be the LAST TERM.

HERE, a = 1, d = 1.5 - 1 = 0.5

WE KNOW,

Sn = n/2(2a + (n -1)d)


HERE

n( no.of terms = 7)

==> S7 = 7/2(2(1) + (7 -1)0.5)

==> S7 = (3.5)(5)

==> S7 = 17.5

HOPE IT HELPS YOU.