$$\text { Find the values of } \sum _ { j = 1 } ^ { 100 } 2 \text { and } \sum _ { j = 1 } ^ { 100 } ( - 1 ) ^ { j } \text {. }$$

Q7: A stamp collector wants to include

Q8: <span class="ql-formula" data-value="\text { Let } \boldsymbol

Q9: (a) Prove or disprove that a

Q10: Let <span class="ql-formula" data-value="f (

Q11: <span class="ql-formula" data-value="\text { Prove or disprove

Q13: Let <span class="ql-formula" data-value="\boldsymbol {

Q14: Suppose that <span class="ql-formula" data-value="f"><span

Q15: Let <span class="ql-formula" data-value="P (

Q16: Let <span class="ql-formula" data-value="A =

Q17: Show that ¬(p ∨ ¬q) and q