Question

Ma puteti ajuta la aceasta problema, va roog? ESTE URGENT! ​

Answer 1

observam ca A¹A²=2×1, A²A³=2×2, A³A⁴=2×3........A⁹⁹A¹⁰⁰=2×99

deci A²⁵A⁷³= A²⁵A²⁶+A²⁶A²⁷+....A⁷²A⁷³

=2×25+2×26+2×27+...2×72

=2(25+26+27+....+72)

=2×[(25+72)+(26+71)+(27+70)+..(48+49)]

=2×23×97

=4462