Question

Find the sum of 6+5 1/4 + 4 1/2+.....,...21terms

Answer 1

Answer:

vbdvsuvhd nd              kjgbf hvufeif8gnfnvrugvvvvvdjvbyvhvbvnvhv guvvvjh

Step-by-step explanation:

nvdbvducifhe

Answer 2

Step-by-step explanation:

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

S21= 21/2(2×6+(20)×(3/4))

= 21/2×(27)

=567/2

= 183 1/2