Question

1+3+5+7+9+-----+19=(-----)2 the two is the power

Answer 1

Answer:

10^2=100..........….....

Answer 2

Answer:

Since it is a arthematic progresion so find its sum use formula s=n/2 (2a+(n-1)d) now putting value s=19/2 (2×1+(19-1 )2)

S=19/2 (2+(18)2)

S=19/2 (2+36)

S=19/2×38

S=19×19

S=19^2