Use Mathematical Induction to prove the sum of Arithmetic Sequences: \" n E (a + (j i 1)d) : E(2a + (n i 1)d) j: 1 Hint: First write down what P( 1) says and then prove it. Then write down what P(k+1) says and prove that using the fact that Pfk) is true. 1 Ways 2 (M 0* 1W : :] j:1 k+1 2 1+ u w z [:i i=1